Postal evidence and the limits of mailing dates Treat the card as both a collectible object and a historical document. Scan both sides before assigning a date, publisher, or value.
Identification workflow
- Transcribe caption, publisher, series, number, and printed text exactly.
- Record whether the back is private-mailing, undivided, divided, or modern.
- Describe stock, border, texture, color process, gloss, and photographic traits.
- Read the postmark and stamp while remembering mailing and printing dates can differ.
- Research the town, building, business, route, event, or person.
Dating the card
Repeatable method: date from multiple physical clues, preserve scans of both sides, and compare like with like. Use the era estimator and value checklist for the sitewide workflow; this page focuses on the specific subject, place, format, or publisher.
What affects collector demand
Research checklist
- Search the exact caption in quotation marks.
- Try historical and modern place-name spellings.
- Compare publisher and production numbers.
- Use libraries, historical societies, maps, newspapers, and directories.
- Compare sold examples with the same view and condition.
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